unvented cylinder

Hi there. I've just had a brand new heating system installed. Worcester Bosch system boiler with optional internal diverter kit, HW output connected to Gledhill unvented cylinder and CH connected to the rads. I believe this is referred to as PDHW or X-Plan - the boiler is either heating the...

So we switched from a vented HW tank to an unvented one about 4 months ago (rads were already on an unvented loop) for pressure and volume reasons. Ever since it's been installed we've had a loud humming noise/vibration in the airing cupboard whenever the hot water is on. We've had the installer...

I have a very tight install for a new retrofit Heat Pump and was wondering if I can have a Spirotech mb3 filter between my unvented cylinder and the T of to my expansion vessel on the return for my heating circuit or is it better to put it on the flow???

Hi All, I have a question with regards to an unvented Heat Geek Newark Cylinder. I recently saw an install of the New HeatGeek cylinder on the Skill builder YouTube channel and noticed that they had removed a sensor pocket and replaced it with a PRV. Ultimate Heat Pump Installation. Rip It Out...

We have recently bought a 5 bed detached which has a combi boiler servicing the ensuite, kitchen and the radiators. there is also a vented cylinder which serves the downstairs cloakroom and family bathroom where the pressure is very low. we wanted to move to a unvented cylinder but are getting...

Hi all, I have a conventional boiler with unvented water cylinder. My heating system pressure has drops to 0.3bar every 3 to 4 days. I checked my water tank and notice this could that explain why I'm loosing pressure in my system? Also more importantly does that look like its leaking from...

Hi, I have an old unvented cylinder in my flat and I've only ever used\needed the topup heater (top thermostat). I've tried the bottom one which supposedly heats up more water as it's lower, but doesn't seem to. As a comparison the top heater will get the water up to temperature then switch off...

Hi, I am planning on going away in December for a week, and I was thinking of shutter the main water to avoid any surprises when I come back. I live in the UK, in a flat, on the top floor. I have a Megaflo Unvented Cylinder. Is it okay to close the main water for the week I am away? I have no...

Hello, we've Recently moved into a new house which has a modern looking unvented Worcester boiler with a megalo tank. Water pressure in the property is pretty disappointing and flow from both hot and cold taps is no where near our previous house. Doing a bit of spring cleaning and bled all the...

Hello all. [following is the edited version as apparently the original had too many words...]. My incoming supply is rubbish. I've looked into improving it through Thames Water and the management company of my flats, but I'm stuck with a little less than 1 bar (second floor flat), and a flow...

Hi, I wonder if anyone can help with my conundrum. I had an electric, unvented hot water cylinder installed last year and the product was registered with the manufacturer. The installer had G3 qualification, which I've checked on Gas Safe register. Apparently though because the boiler is...

Any of you plumbers got any thoughts on this please. Brother in law has Worchester heat only boiler, linked to an unvented cylinder. (Centerstore)... was all new in 2013. He was saying the pressure wasn't very good on his taps... it was the cold feed, which I thought doesn't go through the...

Hello! I have a new Vaillant boiler being installed and will install a new cylinder at the same time. Our installer is recommending a UK Cylinders ProLite Air twin coil solar indirect unvented cylinder 300ltr. According to specs the standing heat loss is 1.80 kWh/24h which seems pretty decent...

Hi all, We have recently had to have our expansion vessel changed on our unvented cylinder set up as the previous one was leaking - we used our home emergency cover and it was fixed yesterday. However, whereas our previous vessel had a bracket built into the body, the engineer admitted they'd...

Hi, I have a small flat which has an 80 litre unvented electric water heater mounted on the wall above the stairwell. It seems a strange place, but I can see they have done it to save space in the small kitchen. Are there any restrictions as to where you can have these? Thanks in anticipation

I have a vaillant ecotec plus 630 boiler. The hot water is not working correctly. Sometimes HW will come on when programmed but not always. HW does come on when the heating and hot water are both programmed to be on. HW is now coming on when the Heating is on but HW should be off. I can...

Hi guys Great forum. I have an unvented cylinder which is a Telford Tempest 250 litres with external expansion vessel, which we have the hot water on from 6am - 10pm (gas boiler). But within 2 hours of the hot water going off, the water from the cylinder is stone cold. If I turn off the hot...

I wasn't sure if this should go in this forum or in the electrical forum but hoping this is the right place. I've got an OSO Direct 20 RD unvented water heater (210 ltrs nominal storage at 2 bars). This is in a 2 bed flat, electricity only. From reading around and looking at the manual I...

I got new plumbing installed last year but I`m struggling to understand how this works as we are not able to see how much water is left inside the cylinder and what temperature. We have set up the Hive to warm water few hours in the morning, then lunch time and few in the evening to reduce...

I moved into a flat in May this year, can't figure out the heating and hot water system. I've tried the FAQ's and searching but can't find anyone posting a question in exactly the same scenario. The letting agent has been useless. The flat has a Dimplex RXPW4 pilot wire controller in the...